Improvement in apparatus foe treating milk



G.-D. GREENL'BAP & D. G. LARKINS.

APPARATUS FOR TREATING MILK. g

No. 76,749. Patented Apr. 14, 1868.

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GEORGE 11- GREENLEAF AND DARIUS c. LAEKI-Ns 0 DEPAUVILLE,

. NEW YORK.

Letters Patent No.-76,-749, dated April 14, 1868.

IMPROVEMENT IN APPARATUS FOR TREATING MILK.

inge fitlgebule referral: in in time @tiitlt fitted no making out of the time TO-ALL WHOM IT MAY CONCERN:

Be it known that we, GEORGE D. GnEEn'LEAE and Dames C. Lnnxnxs, of Depanv'ille, in the county of Jefferson, and State of New York, have invented a new and useful Improvement in Apparatus for Treating Milk; and we do hercby'declarc that the following is a. full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part of this specification, in which Figure 1 is a sectional elevation of an apparatus made according to our invention, the line of section being seen at :v, fig. 2.

Figure 2 is a plan view.

Similarletters of reference indichte like parts.

The object of this invention is to provide a convenient and econoniicalnpparatus by which milk can be heated or cooled, according to the use to be made of it, and it consists in placing a coiled pipe within a pan or other receptacle of the milk, through which pipe the heating or cooling-medium is passed, the pipe being laid down next to the bottom if the object is to heat the milk. but being suspended above the bottom if the milk is to be cooled. I v

Cheese and butter-manufacturers find much difficulty in cooling milk tor-dairy purposes soon enough and sufliciently to prevent it from becoming sour. Our apparatus'fcr treating milk will obviate this difi'iculty, and cheapen the making of cheese, and add largely to the product in making butter.

According to our invention, we, use but one vat, A, instead of two. as in the mode now commonly practised, into which the milk to be treated is poured.

B is a coil of pipe, arranged in the general form of the vet or pan, having its commencement at its centre, where its end, B, is turned up, and is provided with a funnel-shaped mouth. Its other end is turned over the edge of the vat, and carried down below the level of the vet, seas to form a siphon, Bi, whose outlet is governed by a stop-cock, F. The coils at opposite sides are provided with handles, 0 C, by which to lift the pipe out of the vat when it is necessary so to do.

If the milk in the val: is to becooled, we suspend the coil at such a height as barely to submerge it, by means of the chains D and the hooks E, and then discharge a current of cold wnter, iced water if item be had, into the mouth of the pipe. The water passes through the pipe, and out through the siphon, its discharge therefrom being governed by the faucet F. That portion of the milk which surrounds the elevated pipewill become cooled first, and, since it will immediately descend, it induces a current in the vat, that portion of the milk whose temperature has not been reduced flowing upwards, to take the place of the descending portion. The size of the pipe is a question of judgment, but a pipe one inch or one inch and a-hnlf in diameter will probably be large enough. v

When used for heating milk for cheese, we lower the pipe until its coils reston the bottom of the vat, and pass steam or hot water through it in a similar way as explained of cold water. The curd of cheese is now worked to the bottom of the vet, to prevent it from settling in a hard mass, in the common process of making cheese.

To allow of such working, and to prevent the curd from becoming hard in spots under the water-pipe, we make the pipe semicircular, and lay the fiat sides of the coils on the bottom of the vat, thus giving the operator an opportunity to stir every part of the curd.

It will be observed that, by means of our invention, the same apparatus can be used both for cooling and heating milk, the pipe being suspended in the former case, and lowered, and allowed to rest on the bottom, in the other.

We claim as new, and desirev to securehy Letters Patent- 1. The ceding-pipes 13, adjusted in the pet: or vat A, by means of the chains D and pins E, as herein described, for the purpose specified. i

2. The combination and arrangement of the adjusteble pipes B, having central tur ned-up end B and siphpu B, the handles 0, and vet A, as herein described, for thB'PilIpOSO specified.

t GEO. D. GREENLEAF,

D. O. LARKINS.

Witnesses to G. D. GREENLEAF'S signaturei E. S. Bmnss, MARIA T-IBEARBS'.

Witnesses to D. G. Lmxmss ignatura:

L. E. PHILLIPS L. PHILLIPS. 

